Hikaru no go. Volume 1, The go master's descent
Hikaru Shindo is just a normal 12 year old Japanese boy. One day, he's rumaging through his Grandfather's things pulls out an old Go board. A ghostly apparation appears out of the board. His name is Sai Fujiwara, a man who was a Go instructor to the emperor of Japan a thousand years ago. Now, he haunts a Go board, and wants to accomplish the perfect Go game, called the "Hand of God." In the blink of an eye Sai becomes part of Hikaru's consciousness.